package com.hao.netty.chapter03;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import lombok.extern.log4j.Log4j;

/**
 * @Description //TODO
 * @Date 2020/1/12
 * @Author songhao
 **/
@Log4j
public class TimeClientHandler extends ChannelHandlerAdapter {

    private final ByteBuf firstMessage;

    public TimeClientHandler(){
        byte[] req = "QUERY TIME ORDER".getBytes();
        //byte[] req = "Hello".getBytes();
        firstMessage = Unpooled.buffer(req.length);
        firstMessage.writeBytes(req);
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        ctx.writeAndFlush(firstMessage);
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf)msg;
        byte[] req = new byte[buf.readableBytes()];
        buf.readBytes(req);
        String body = new String(req,"UTF-8");
        System.out.println("Now is : " + body);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        //始放资源
        log.warn("Unexpected exception from downstream:" + cause.getMessage());
        ctx.close();
    }
}

